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May 23, 2004
CTIA Cellphone Directory - Open to Abuse?
The Cellular Telecommunications and Internet Association (CTIA) has announced that it is putting together a directory which will contain 75% of the 163 million mobile phone numbers in the USA.
The CTIA is positioning the directory towards real estate agents and other mobile professionals who want people to be able to find their mobile numbers.
However, critics fear that publishing the directory will undermine privacy and open phones to a flood of unwanted calls. In addition, the numbers make it easy to deduce addresses of phones that receive e-mail since usually the number is the user name part of the e-mail address, opening users to e-mail abuse.
One major carrier, Verizon Wireless, has vowed to keep its 39 million subscribers out of the directory, calling the initiative misguided.
There are big numbers at stake. Consulting firm Zelos Group estimates that the directory could generate an estimated $3 billion in annual fees and additional minutes by 2009.
Since cell phones were introduced, mobile numbers have remained private because in the US, recipients of calls pay for air time, and so are reluctant to distribute numbers. Furthermore, 30% of users change carriers each year, making an accurate directory difficult to compile. That changed when the Federal Communications Commission (FCC) allowed the portability of mobile numbers.